Device for feeding lap of fibres to carding member of ringless spinning apparatus

ABSTRACT

The device includes a feed-in couple made up by a feed plate adapted to support the lap and a feed roller with needles, arranged above the feed plate, the feed roller having a plurality of resilient rods extending along the generatrix of the roller intermediate of the needles thereof, the rods being supported between a pair of supports so that each rod has one end rigidly secured in one of the supports, while the other end of the rod is supported by the other support so that it may be freely displaced longitudinally of the roller to provide for gradual bending in of the rod upon engagement thereof with the lap, which produces an effort tending to remove the lap off the needles of the roller. The provision of the rods minimizes the possibility of the lap becoming wound about the needles of the roller and thus raises the efficiency of the spinning apparatus.

United States Patent Leinek et al.

[ June 17, 1975 DEVICE FOR FEEDING LAP OF FIBRES TO CARDING MEMBER OFRINGLESS SPINNING APPARATUS [76] Inventors: Albert Arturovich Leinek,ulitsa Sovetskaya, 111, kv. 39; Igor Stepanovich Khomyakov, ulitsaSovetskaya, 125, kv. 23, both of Kostroma; Igor Serafimovich Privalov,ulitsa Karla Marxa,.l 2, kv. 18, Penza; Galina Pavlovna Filaretova,ulitsa Sovetskaya, l 11, kv. 31, Kostroma, all of USSR.

[22] Filed: Jan. 25, 1974 21 Appl. No.1 436,729

[52] US. Cl 19/105; 19/178 [51] Int. Cl D0lg 15/40 [58] Field of Search19/105, 86, 128, 96;

[56] References Cited UNITED STATES PATENTS 151,938 6/1874 Todd 481,0248/1892 Hanscom 19/105 FOREIGN PATENTS OR APPLICATIONS 1,435,926 3/1966France 19/128 Primary Examiner Dorsey Newton Attorney, Agent, orFirm-Fleit & Jacobson [57] ABSTRACT The device includes a feed-in couplemade up by a feed plate adapted to support the lap and a feed rollerwith needles, arranged above the feed plate, the feed roller having aplurality of resilient rods extending along the generatrix of the rollerintermediate of the needles thereof, the rods being supported between apair of supports so that each rod has one end rigidly secured in one ofthe supports, while the other end of the rod is supported by the othersupport so that it may be freely displaced longitudinally of the rollerto provide for gradual bending in of the rod upon engagement thereofwith the lap, which produces an effort tending to remove the lap off theneedles of the roller. The provision of the rods minimizes thepossibility of the lap becoming Wound about the needles of the rollerand thus raises the efficiency of the spinning apparatus.

3 Claims, 2 Drawing Figures 1 DEVICE FOR FEEDING LAP OF FIBRES TOCARDING MEMBER OF RINGLESS SPINNING APPARATUS The present inventionrelates to apparatus for ringless spinning of fibres and, moreparticularly, to devices for feeding a lap of fibres to the cardingmember of such apparatus.

The present invention may be utilized with utmost effectiveness forproduction of medium and low count yarn from chemical stable fibre, flaxfibre, as well as from blends of the above fibre with woollen fibre andwith one another.

A device is known for feeding fibres to the carding member of a ringlessfibre spinning apparatus, comprising a feed-in couple made up by a feedplate adapted to support a lap of the fibres and a feed roller witheither a needle clothing or a saw-toothed clothing, adjustable along asarc relative to this feed plate, to provide for adjustment of thespacing between the point where fibres are gripped off the lap and thepoint where they are doffed by a stripper roller, in accordance with thetype of fibre being treated.

However. this known device is devoid of any means preventing apossibility of the fibres taken from the lap becoming wound about thefeed roller with either a needle clothing or a saw-toothed one, whichleads to an increased breakage rate and wasting time to remedy thesituation when the fibres are wound about the roller.

Furthermore, the known device does not provide for increasing the numberof either needles or projections of a saw-toothed clothing, cooperatingwith the fibres, to offer an improved control over the fibres taken inthe from the lap.

It is an object of the present invention to provide a device for feedinga lap of fibres, which would minimize the possibility of the lapbecoming wound about the needles of the driven feed roller.

It is an important object of the present invention to provide a devicefor feeding a lap of fibres, which would raise the efficiency of theringless fibre spinning apparatus.

These and other objects are attained in a device for feeding a lap offibres to the carding member of an apparatus for ringless spinning ofthese fibres, comprising a feed-in couple made up by a feed plateadapted to support a tensioned lap and is driven feed roller withneedles, arranged above this feed plate and adapted to cooperate withthe lap and to feed it by rotation of this feed roller to the cardingmember, in which device, in accordance with the present invention, thefeed roller has thereon, intermediate of these needles, a plurality ofresilient rods extending along the generatrix of the roller andalternating with the needles, also adapted to cooperate with the lap andsupported between a pair of supports. The rods are mounted on thesesupports so that each rod has one end thereof rigidly secured in one ofthe supports, while the other end thereof is supported by the othersupport for free displacement along the generatrix of the roller toprovide for gradual bending-in of the rod upon cooperation thereof withthe lap, whereby an effort is produced to move the lap off the needlesof the feed roller. The device thus makes the lap be moved off theneedles of the feed roller by the energy stored by the bent-in resilientrods, which minimizes the possibility of the lap becoming wound aboutthe needle roller and thus raises the efficiency of the device.

To increase the number of the needles and of the rods simultaneouslyengaging the tensioned lap, there is mounted on the feed plate upstreamof the feed roller in the direction of the advance of the lap a stripwith a rounded apex over which the lap is made to slide, whereby theangle of engagement of the feed roller with the lap is increased. Tostep up the tension of the lap on account of greater friction betweenthe lap and the feed plate, there is arranged upstream of said strip aweight roller pressing the lap against the feed plate, which increasesthe number of the needles and rods simultaneously engaging the fibrouslap.

The increased number of the rods and needles simultaneously engaging thelap is essential for firmer gripping of the fibres by the needles of thefeed roller, as well as for better separation of the fibres at carding.It is particularly essential in the case of chemical fibres which areless wavy than natural ones. Better separation of such fibres, in turn,reduces nonuniformity of the yarn produced by the associated spinningapparatus, and, consequently, reduces the eventuality of breaking ofthis yarn, which also makes for higher productivity.

The present invention will be better understood from a description of anembodiment thereof with reference to the accompanying drawings, wherein:

FIG. 1 is a schematic side view of a device for feeding a lap of fibresto the carding member of a ringless spinning apparatus;

FIG. 2 is a sectional view along line II-II of FIG. 1.

Referring now to the appended drawings, the device for feeding a lap offibres to the carding member of an apparatus for ringless spinning ofthese fibres includes a feed-in couple made up by a feed plate 1(FIG. 1) adapted to support thereon a tensioned fibrous lap 2 and adriven feed roller 3 with needles 4, mounted above the feed plate 1 andadapted to feed the lap 2 to a carding member 5.

Arranged intermediate of the needles 4 of the feed roller 3 areresilient rods 6 (FIG. 2) extending along the generatrix of the feedroller 3, each rod 6 having one end thereof rigidly secured in a support7 and the other end supported by another support 8 so that the latterend is free to slide in this support 8 along the generatrix of the feedroller 3 to provide for gradual bending-in of the rod 6 upon engagingthe lap 2 and for subsequent straightening of this rod 5, to move thelap 2 off the needles 4 of the feed roller 3. Also mounted on the feedplate 1 (FIG. 1) is a strip 9 with a rounded apex, over which the lap 2is made to slide, the provision of this strip 9 increasing the number ofthe needles 4 0f the feed roller 3 and of the rods 6 simultaneouslyengaging the lap 2. Mounted upstream of the strip 9 in the direction ofthe advance of the lap 2 is a weight roller 10 pressing the lap 2 to thefeed plate 1 and thus increasing friction between the lap and the plate,whereby the tension of the lap is raised, which also increases thenumber of the needles and rods simultaneously engaging the fibrous lap2.

To vary the number of the needles and rods simultaneously engaging thelap 2, the strip 9 is easily removable and replaceable with a similarstrip of a different height.

OPERATION OF THE DEVICE The feed roller 3 is rotated, the needles 4 ofthe feed roller 3 pierce the lap 2 of fibres passing intermediate of theroller and the feed plate 1 and forward this lap to the carding member5. The clothing of the carding member 5 takes elementary fibres from thelap and supplies them to the associated ringless spinning apparatus (notshown). Rotation of the feed roller 3 and of the carding member ofcylinder 5 is effected in any suitable known manner.

Upon engaging the tensioned lap 2, the rods 6 supported by the twosupports 7 and 8 resiliently bend in (FIG. 2), and, when the lap isbeing doffed off the needles by the carding effort, the bent resilientrods 6 help to move the lap off the needles, and, which is moreimportant, help to remove from the needles foreign matter stuck thereonfrom the lap 2 which the needles have pierced. Thus, when the lapincludes woollen fibres, it is also liable to include burrs, and whenthe lap includes flax fibres, it is liable to include chaff.

To increase the number of the needles and rods simultaneously engagingthe lap, it is necessary to increase the angle or arc of the engagementof the driven needle cylinder 3 with the lap, which is effected bymounting the easily replaceable strip 9 with a rounded apex (FIG. 1),over which the lap is made to slide.

The lap 2 is initially tensioned by its own weight and by the resistancethereof to being paid off the known lap supply means (not shown). Toincrease the tension of the lap, the weight roller 10 is placed thereonupstream of the strip 9, the weight of this roller 10 increasingfriction between the lap and the feed plate 1, which additionallytensions the lap, which increases the angle or are of engagement of theneedle roller 3 and the lap 2.

What is claimed is:

l. A device for feeding a lap of fibres t0 the carding member of anapparatus for ringless spinning of fibres, comprising: a feed plateadapted to support thereon a tensioned lap of fibres; a driven rollerwith needles, arranged above said feed plate and defining therewith afeed-in couple, said needles being adapted for cooperation with said lapto feed said lap at rotation of said feed roller toward said cardingmember; a plurality of resilient rods arranged adjacent to the externalsurface of said feed roller, extending along the generatrix thereofintermediate of said needles; a pair of supports mounted on said feedroller and supporting said resilient rods therebetween; each said rodhaving one end thereof rigidly secured in one of said supports andhaving the other end thereof supported by the other one of said supportsfor free displacement thereof along the generatrix of said feed roller,to provide for gradual resilient bending in of said rod upon engagementthereof with said lap, whereby there is produced an effort tending tomove said lap off said needles of said feed roller.

2. A device as claimed in claim 1, further comprising a vertical stripwith a rounded apex over which the lap slides to engage said feed rollerat an angle, said strip being mounted on said table upstream of saidfeed roller in the direction of the advance of said tensioned lap,adapted for cooperation with said lap and having a sufficient verticalheight relative to the feed roller to change the angle of engagementwith the roller and increase the number of said needles and of said rodssimultaneously engaging said lap.

3. A device as claimed in claim 2, further comprising a weight rollerarranged on said feed plate upstream of said strip, adapted to presssaid tensioned lap to said feed plate.

1. A device for feeding a lap of fibres to the carding member of anapparatus for ringless spinning of fibres, comprising: a feed plateadapted to support thereon a tensioned lap of fibres; a driven rollerwith needles, arranged above said feed plate and defining therewith afeed-in couple, said needles being adapted for cooperation with said lapto feed said lap at rotation of said feed roller toward said cardingmember; a plurality of resilient rods arranged adjacent to the externalsurface of said feed roller, extending along the generatrix thereofintermediate of said needles; a pair of supports mounted on said feedroller and supporting said resilient rods therebetween; each said rodhaving one end thereof rigidly secured in one of said supports andhaving the other end thereof supported by the other one of said supportsfor free displacement thereof along the generatrix of said feed roller,to provide for gradual resilient bending in of said rod upon engagementthereof with said lap, whereby there is produced an effort tending tomove said lap off said needles of said feed roller.
 2. A device asclaimed in claim 1, further comprising a vertical strip with a roundedapex over which the lap slides to engage said feed roller at an angle,said strip being mounted on said table upstream of said feed roller inthe direction of the advance of said tensioned lap, adapted forcooperation with said lap and having a sufficient vertical heightrelative to the feed roller to change the angle of engagement with theroller and increase the number of said needles and of said rodssimultaneously engaging said lap.
 3. A device as claimed in claim 2,further comprising a weight roller arranged on said feed plate upstreamof said strip, adapted to press said tensioned lap to said feed plate.